Add style and logic for constraining the query concept panel height
Abstract out logic in  $.fn.stacked
Add optimized applyStackedHeights path and resize handler

For simple stacks (which happen to be the most common) such as
static + fluid or static + fluid + static, the top and bottom positions
can be defined relative to the edges of the stack which prevents
needing to recompute the intermediate positions.
Add StackedColumn test spec
Fix incorrect reference to paddingTop/Bottom
Respect use of margins and paddings of stacked elements
Make restack animation optional for optimized layouts

This was primarily added to remove a race condition in the test suite.
Add 10px bottom margin to context itself, remove info-region padding

The info-region padding was a hack prior to 4ac35782